Symmetrical series fan structure

ABSTRACT

A symmetrical series fan structure includes multiple frame bodies made with single mold. Each frame body has a first through hole, a second through hole and a base having multiple connection members. The base is positioned in the second through hole on one side of the frame body and connected to the frame body via the connection members. The frame body has multiple fixing members and multiple fixing holes on the same side of the frame body as the base. The frame bodies are serially connected by means of inserting the fixing members into the fixing holes with the bases and the connection members of the frame bodies attached to each other. Accordingly, the frame bodies can be made with single mold and assembled to form the symmetrical series fan structure. In this case, the mold development cost is saved and the manufacturing cost is lowered.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a series fan structure, and more particularly to a series fan structure in a symmetrical form. The frame bodies of the series fan structure can be made with single mold and assembled to form the symmetrical series fan structure. In this case, the mold development cost is saved and the manufacturing cost is lowered.

2. Description of the Related Art

Recently, the internal circuits of the integrated circuit (IC) chip have been laid out more and more compactly. Consequently, the chip generates higher and higher heat. When a personal computer works, the compact IC chip such as CPU or graphics chip will generate high heat. In order to keep the IC chip functioning lastingly, it is necessary to maintain the IC chip at an optimal working temperature. In this case, rise of temperature can be avoided so as not to deteriorate the efficiency of the IC chip or damage the IC chip. In general, a heat dissipation device is used to directly contact the surface of the electronic component for dissipating the heat generated by the electronic component. Accordingly, the electronic component can keep working normally without shortening its lifetime.

A cooling fan is an inevitable component of a heat dissipation device. The cooling fan is able to quickly carry away the heat absorbed by a radiating fin assembly to complete a thermal cycle and achieve better heat dissipation effect.

In general, two cooling fans are serially connected with each other to dissipate the heat generated by a heat source. Under such circumstance, in case one of the cooling fans fails, the other cooling fan can still operate to dissipate the heat so as to avoid damage of the heat source due to overheating. Moreover, in an operation system with high static pressure, the series cooling fan has better performance and is able to provide higher wind intensity.

FIG. 1A is a perspective exploded view of a conventional series fan. FIG. 1B is a perspective assembled view of the conventional series fan. The series fan 1 includes a first frame body 10 and a second frame body 11. The first frame body 10 has a first base 101 on one side. The first base 101 is connected to the first frame body 10 via multiple first connection members 102 in arcuate form. In addition, the first base 101 is formed with multiple fixing holes 103.

The second frame body 11 has a second base 111 on one side. The second base 111 is connected to the second frame body 11 via multiple second connection members 112 in arcuate form. In addition, the second base 111 is formed with multiple fixing members 113. The fixing members 113 can be connected to the fixing holes 103 to serially connect the first and second frame bodies 10, 11. In this case, the bottoms of the first base 101 and the first connection members 102 are respectively attached to the bottoms of the second base 111 and the second connection members 112 to form the series fan 1. According to the above arrangement, the first and second frame bodies 10, 11 are respectively formed with male and female fixing structures. Moreover, the first and second connection members 102, 112 are arcuate members directed in different directions. Therefore, it is necessary to use two sets of molds to manufacture the first and second frame bodies 10, 11. This leads to increase of mold development cost and manufacturing cost. Accordingly, the conventional series fan has the following shortcomings:

1. The mold development cost is increased.

2. The manufacturing cost is increased.

SUMMARY OF THE INVENTION

A primary object of the present invention is to provide a symmetrical series fan structure. The frame bodies of the symmetrical series fan structure can be made with single mold and assembled to form the symmetrical series fan structure. Accordingly, the mold development cost is saved to lower the manufacturing cost.

To achieve the above and other objects, the symmetrical series fan structure of the present invention includes multiple frame bodies. Each frame body has a first through hole, a second through hole and a base. The first and second through holes are respectively formed on two sides of the frame body. Multiple connection members extend from a circumference of the base. The base is positioned in the second through hole and connected to the frame body via the connection members. In addition, the frame body has multiple fixing members and multiple fixing holes on the same side of the frame body as the base. The frame bodies are serially connected by means of inserting the fixing members into the fixing holes with the base and the connection members of one frame body attached to the base and the connection members of another frame body. Accordingly, the frame bodies can be made with single mold and serially assembled to form the symmetrical series fan structure. In this case, the mold development cost is saved and the manufacturing cost is lowered. Accordingly, the present invention has the following advantages:

1. The mold development cost is saved.

2. The manufacturing cost is lowered.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

FIG. 1A is a perspective exploded view of a conventional series fan;

FIG. 1B is a perspective assembled view of the conventional series fan;

FIG. 2 is a perspective exploded view of a first embodiment of the symmetrical series fan structure of the present invention;

FIG. 3 is a perspective assembled view of the first embodiment of the symmetrical series fan structure of the present invention;

FIG. 4 is a sectional assembled view of the first embodiment of the symmetrical series fan structure of the present invention;

FIG. 5 is a perspective exploded view showing the application of the first embodiment of the symmetrical series fan structure of the present invention;

FIG. 6 is a perspective assembled view showing the application of the first embodiment of the symmetrical series fan structure of the present invention; and

FIG. 7 is a perspective exploded view of a second embodiment of the symmetrical series fan structure of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 2 and 3. FIG. 2 is a perspective exploded view of a first embodiment of the symmetrical series fan structure of the present invention. FIG. 3 is a perspective assembled view of the first embodiment of the symmetrical series fan structure of the present invention. The symmetrical series fan structure 2 includes multiple frame bodies 30. In this embodiment, the symmetrical series fan structure 2 includes two frame bodies 30, which are serially connected and assembled with each other. Each frame body 30 has a first through hole 301, a second through hole 302 and a base 303. The first and second through holes 301, 302 are respectively formed on two sides of the frame body 30. A flow way 304 is formed between the first and second through holes 301, 302. Multiple connection members 3031 extend from a circumference of the base 303 in straight form. The base 303 is positioned in the second through hole 302 and connected to the frame body 30 via the connection members 3031. In addition, the frame body 30 has multiple fixing members 305 and multiple fixing holes 306 on the same side of the frame body 30 as the base 303. In this embodiment, the fixing members 305 and fixing holes 306 are diagonally disposed on one side of the frame body 30 with the base 303.

The frame bodies 30 are formed by means of single mold. When serially connecting two frame bodies 30, one of the frame bodies 30 is turned over and rotated to assemble with the other. Under such circumstance, the two frame bodies 30 are assembled with the second through holes 302 aligned with and immediately adjacent to each other. Also, the fixing members 305 of one frame body 30 are aimed at the fixing holes 306 of the other frame body 30 and inserted into the fixing holes 306. Accordingly, the corners of one frame body 30 are respectively affixed to the corners of the other frame body 30 with the bases 303 and connection members 3031 of the two frame bodies 30 attached to each other and with the flow ways 304 of the two frame bodies 30 in good communication with each other. Accordingly, the frame bodies 30 can be made with single mold and assembled to form the symmetrical series fan structure 2. This can save the mold development cost and lower the manufacturing cost.

Please now refer to FIGS. 5 and 6. FIG. 5 is a perspective exploded view showing the application of the first embodiment of the symmetrical series fan structure of the present invention. FIG. 6 is a perspective assembled view showing the application of the first embodiment of the symmetrical series fan structure of the present invention. Two fan impellers 40 are respectively disposed in the first through holes 301 of the frame bodies 30 to form the symmetrical series fan structure 2 with dynamic blades and static blades alternately arranged. This can increase wind intensity and enhance performance of the fan impellers 40.

Please now refer to FIG. 7, which is a perspective exploded view of a second embodiment of the symmetrical series fan structure of the present invention. The second embodiment is substantially identical to the first embodiment in structure and connection relationship between the components and thus will not be repeatedly described hereinafter. The second embodiment is different from the first embodiment in that the fixing members 305 of one side of the frame body 30 are positioned on the same lateral side rather than diagonally arranged and the fixing holes 306 are positioned on another lateral side opposite to the fixing members 305. In this case, the frame bodies 30 can be also formed by means of single mold. When serially connecting two frame bodies 30, the fixing members 305 of one frame body 30 are aimed at the fixing holes 306 of the other frame body 30 and inserted into the fixing holes 306. Also, the bases 303 and connection members 3031 of the two frame bodies 30 attached to each other with the flow ways 304 of the two frame bodies 30 in good communication with each other. Accordingly, the frame bodies 30 can be made with single mold and assembled to form the symmetrical series fan structure 2. This can save the mold development cost and lower the manufacturing cost.

The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. It is understood that many changes and modifications of the above embodiments can be made without departing from the spirit of the present invention. The scope of the present invention is limited only by the appended claims. 

1. A symmetrical series fan structure comprising multiple frame bodies, each frame body having a first through hole, a second through hole and a base, the base having multiple connection members, the base being positioned in the second through hole on one side of the frame body and connected to the frame body via the connection members, the frame body having multiple fixing members and multiple fixing holes on the same side of the frame body as the base, the frame bodies being serially connected by means of inserting the fixing members into the fixing holes with the connection members of the frame bodies attached to each other.
 2. The symmetrical series fan structure as claimed in claim 1, wherein the fixing members are diagonally disposed on the side of the frame body.
 3. The symmetrical series fan structure as claimed in claim 2, wherein the fixing holes are diagonally disposed on the side of the frame body on different corners thereof, whereby when serially connecting the frame bodies, the fixing members of one frame body are inserted into the fixing holes of another frame body.
 4. The symmetrical series fan structure as claimed in claim 1, wherein the fixing members are disposed on the same lateral side of the frame body.
 5. The symmetrical series fan structure as claimed in claim 4, wherein the fixing holes are disposed on another lateral side of the frame body opposite to the fixing members, whereby when serially connecting the frame bodies, the fixing members of one frame body are inserted into the fixing holes of another frame body.
 6. The symmetrical series fan structure as claimed in claim 1, wherein when serially connecting the frame bodies, the base and the connection members of one frame body are attached to the base and the connection members of another frame body.
 7. The symmetrical series fan structure as claimed in claim 1, wherein a fan impeller is disposed in the first through hole of each frame body.
 8. The symmetrical series fan structure as claimed in claim 1, wherein a flow way is formed between the first and second through holes.
 9. The symmetrical series fan structure as claimed in claim 1, wherein the base is connected to the frame body via the connection members in straight form. 